US7305922B2 - Printing blanket having a rigid carrier plate - Google Patents

Printing blanket having a rigid carrier plate Download PDF

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Publication number
US7305922B2
US7305922B2 US11/014,398 US1439804A US7305922B2 US 7305922 B2 US7305922 B2 US 7305922B2 US 1439804 A US1439804 A US 1439804A US 7305922 B2 US7305922 B2 US 7305922B2
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United States
Prior art keywords
covering layer
sealant
elastic covering
layer
printing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US11/014,398
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English (en)
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US20050166778A1 (en
Inventor
Thomas Kandlbinder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Assigned to MAN ROLAND DRUCKMASCHINEN AG reassignment MAN ROLAND DRUCKMASCHINEN AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANDLBINDER, THOMAS
Publication of US20050166778A1 publication Critical patent/US20050166778A1/en
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Assigned to MANROLAND AG reassignment MANROLAND AG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: MAN ROLAND DRUCKMASCHINEN AG
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—Top layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/04—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/06—Backcoats; Back layers; Bottom layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/10—Location or type of the layers in multi-layer blankets or like coverings characterised by inorganic compounds, e.g. pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds

Definitions

  • the present invention generally relates to a printing blanket having a rigid carrier plate on which at least one elastic layer is arranged with a surface that can be inked in order to transfer a printing image to a printing-material web.
  • the images to be printed are transferred by a form cylinder onto an offset cylinder, which is usually referred to as a rubber blanket cylinder.
  • the image is then transferred from the rubber blanket cylinder onto a printing material.
  • printing blankets consisting of a multi-layer construction, which are commonly referred to as rubber blankets, were predominantly clamped on the rubber blanket cylinder with the ends of the rubber blanket fixed in the cylinder channel.
  • This type of rubber blanket typically has a thickness of approximately 2 mm. Accordingly, an opening of at least 4 mm was necessary just to insert the two ends of the rubber blanket into the cylinder channel.
  • the width of the clamping channel of a rubber-covered cylinder had to be substantially larger due to various factors in order to be able to change the rubber blankets during operation without disturbances.
  • a rubber blanket, in which the flexible layers are arranged on a rigid flexible carrier is disclosed in WO 01/70 512 A1.
  • the rubber layers of the blanket have corresponding reinforcements comprising a textile, a covering layer (i.e., a printing layer) and customarily a compressible layer.
  • the carrier is customarily a metal plate.
  • a steel plate is frequently used.
  • the rubber-layer construction is typically fixed to the steel plate, particularly adhesively bonded to the steel plate. As described, this construction comprises at least one covering layer whose surface holds the printing image. This surface can consist of, for example, an elastomeric material. It is advantageous, but not necessarily required, to provide a woven-fabric layer below the covering layer.
  • a layer of compressible material that can contain air inclusions is customarily used below the woven-fabric layer.
  • This layer construction can be fixed to the carrier plate by an adhesion promoter.
  • the leading and trailing ends of the plate are not covered by the rubber-layer construction.
  • only the thin steel sheets have to be inserted into the cylinder channel and fastened in the channel.
  • the result of this is a substantial reduction in the channel width, which has substantial advantages, as is known.
  • the ends of the rubber layer are therefore opposite one another above the cylinder channel.
  • a printing blanket in which the rubber layer, like the printing blanket described above also has a layer construction consisting of a plurality of layers is disclosed in DE 101 17 409 A1.
  • This layer construction is sealed at the two ends of the printing blanket.
  • the sealant extends over the overall height of the material thickness of the rubber-blanket-layer construction.
  • the sealant partially covers the free ends of the metal layer (i.e. of the sheet-metal plate) that are to be inserted into the cylinder channel.
  • the thickness of the elastomeric coating sealant it is considered advantageous for the thickness of the elastomeric coating sealant to be increased continuously in the direction of the metal plate. As a result, a significantly large area of the elastomeric coating is produced above the rubber-covered plate or above an adhesion-promoter layer used on the rubber-covered plate. This measure is intended to counteract tangential forces that are produced, in particular, at the base point of the printing blanket, namely in the transition region of the elastomeric coating or of the sealant.
  • the known metallic backed rubber blankets described above have the disadvantage that their service life is considerably less than the service life of conventional rubber blankets not having a metal plate.
  • the sealing of the printing blanket surface as far as the steel sheet described above ensures complete sealing.
  • an object of the present invention is providing a printing blanket having a rigid carrier plate that does not have the disadvantages described above and that, in particular, has a longer service life than the printing blankets of this type.
  • the service life of metallic backed printing blankets according to the invention ideally approach the service life of conventional rubber blankets.
  • FIG. 1 is a schematic side view of a rubber printing blanket with a rigid carrier plate having a known construction.
  • FIG. 2 is a schematic side view of an exemplary rubber printing blanket with a rigid carrier plate constructed according to the present invention.
  • FIGS. 3 a - f are schematic side views of various alternative embodiments of the ends of the covering layer of the blanket of FIG. 2 .
  • FIG. 4 is side view of an exemplary sealant stencil for manufacturing rubber printing blankets having rigid carrier plates according to the invention.
  • FIG. 1 illustrates diagrammatically the basic construction of a known rubber printing blanket having a metal or metallic carrier plate which, with regard to the layer construction, can also be used in the printing blankets according to the invention.
  • a different layer construction with a larger or smaller number of individual layers can also be used within the context of the invention.
  • the metallic backed rubber printing blanket 1 of FIG. 1 comprises at least one covering layer 2 .
  • the covering layer 2 represents the printing layer, as its surface can be inked with the printing image in order to transfer the printing images onto a printing material (not shown).
  • a metal plate 3 is shown on the lower side of the metallic backed rubber blanket 1 . Only the right-hand section of the rubber blanket 1 is shown.
  • the plate end 4 of the metal plate 3 which preferably is a steel plate, is not provided with the rubber layer and thus can be fixed in the clamping channel of a blanket cylinder together with the second end (not shown) of the metal plate 3 . Except for the plate ends, the metal plate 3 is provided with a multi-layer construction.
  • the multi-layer construction can include a non-expandable layer (e.g., a woven-fabric layer 8 ), a compressible layer 9 having air inclusions, and an adhesive layer (e.g., an adhesive 10 ).
  • a non-expandable layer e.g., a woven-fabric layer 8
  • a compressible layer 9 having air inclusions
  • an adhesive layer e.g., an adhesive 10
  • the sealant 5 is very thin, in particular in the upper region of the multi-layer construction. This is true, in particular, in the area of the end of the covering layer 2 .
  • problems can occur. In particular, there is a risk that the covering layer 2 can detach itself from the layers lying underneath or, in some circumstances in the event of a partial detachment, there is a risk of dampening solution or the like penetrating the multi-layer construction.
  • a particular aspect of the present invention involves removing the risk of the sealant detaching from the covering layer.
  • the sealant geometry is optimized to the extent that the area for adhesion to the printing blanket is increased with simultaneous minimization of the stress applied to the sealant. In the simplest case, this can be achieved by increasing the adhesive area of the sealant 5 , in particular at the covering layer 2 .
  • a substantially greater adhesive area or adhesive-area geometry is produced by a roughening process in comparison with a smooth, i.e. not roughened layer, as is produced, for example, by a cut. Such a roughening process improves the adhesion of the sealant, in particular on the covering layer. As a result, it is possible to avoid the described problems and, in particular, the service life of the printing blanket with rigid carrier plates can be increased.
  • the increase of the area for adhesion to the printing blanket can be achieved by selecting a step shape that extends transversely over the metallic printing blanket at the end of the covering layer 2 as the sealant geometry 6 .
  • a substantially larger area for adhesion to the covering layer 2 is available to the sealant 5 as a result of using the step shape as the sealant geometry 6 at the end (e.g., at the leading end of the metallic backed rubber blanket) in comparison with a planar cut or a flat end of the covering layer in accordance with the known arrangements (cf. FIG. 1 ).
  • This increase in the adhesive area between the covering layer 2 and sealant 5 substantially reduces the risk of the sealant detaching from the covering layer 2 .
  • the service life of the rubber blankets is correspondingly increased significantly.
  • FIGS. 3 a - f illustrate various alternative shapes for the design of the ends of the covering layer 2 . All the alternative shapes increase the adhesive area 6 and thus result in the abovementioned advantages.
  • a sealant geometry 6 can be seen in FIG. 3 a in which the lower region of the covering layer is slightly beveled although it provides a certain step shape.
  • the upper region of the covering layer 2 is slightly beveled, after which the lower part extends vertically.
  • FIG. 3 c shows a corrugated or zigzag-shaped design of the end or the edge of the covering layer 2 as the sealant geometry 6 .
  • a bevel in the covering layer 2 that protrudes beyond the layers lying underneath is used. This bevel likewise provides an increased adhesive area compared with a vertical end.
  • FIGS. 3 e and 3 f show a covering layer 2 that protrudes beyond the layers lying underneath. Due to the overhang, a sealant geometry can be produced on the underside of the covering layer 2 that also can be configured to be large enough that sufficient adhesion is achieved.
  • the covering layer 2 also has an overhang in the representation according to FIG. 3 f and is at the same time configured to be approximately hook-shaped, with the result that a very considerable increase in the sealant geometry 6 adhesive area can be achieved.
  • FIG. 4 shows a sealing geometry 6 that is similar to FIG. 3 b .
  • a shape stencil 7 is provided having a side (the left-hand side in FIG. 4 ) with a corresponding shape.
  • the stencil shape can take into consideration how thickly the sealant 5 is to be applied overall and how it is to be adapted to the geometry of the end of the covering layer 2 that is configured according to the invention.
  • FIG. 4 shows that it is advantageous to shape the sealant 5 with the shape stencil 7 in such a way that the sealant 5 terminates with the upper side of the covering layer 2 and extends with a sufficient width over the plate ends, in this case the plate end 4 . It is also possible to select the thickness of the sealant 5 accordingly via the overall height, which can be seen in the lower step on the shape stencil 7 .
  • shape stencil 7 Before the shape stencil 7 is used, a sufficient amount of the sealant 5 is applied manually or automatically over the metallic backed rubber blanket 1 . The shape stencil 7 is then pulled transversely over the end region of the rubber-blanket layer structure, for example manually, as can be seen in FIG. 4 .
  • shape stencils other than that shown in FIG. 4 to achieve the desired geometric shapes with a corresponding sealant-layer cover.

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  • Printing Plates And Materials Therefor (AREA)
US11/014,398 2003-12-19 2004-12-16 Printing blanket having a rigid carrier plate Expired - Fee Related US7305922B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10360015.9 2003-12-19
DE10360015A DE10360015A1 (de) 2003-12-19 2003-12-19 Drucktuch mit einer starren elastischen Trägerplatte

Publications (2)

Publication Number Publication Date
US20050166778A1 US20050166778A1 (en) 2005-08-04
US7305922B2 true US7305922B2 (en) 2007-12-11

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US11/014,398 Expired - Fee Related US7305922B2 (en) 2003-12-19 2004-12-16 Printing blanket having a rigid carrier plate

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US (1) US7305922B2 (de)
EP (1) EP1543987B1 (de)
DE (2) DE10360015A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004021498A1 (de) * 2004-04-30 2005-11-24 Man Roland Druckmaschinen Ag Übertragungstuch, insbesondere Gummituch, für eine Druckmaschine
DE102008029819A1 (de) * 2008-06-25 2009-12-31 Manroland Ag Aufzug eines Zylinders einer Rollendruckmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543584C1 (de) 1995-11-23 1997-07-24 Koenig & Bauer Albert Ag Gummituch für eine Druckmaschine
DE20007227U1 (de) 2000-04-20 2001-05-23 Contitech Elastomer Besch Gmbh Drucktuch zur Verwendung auf Druckzylindern für insbesondere Offset-Druckmaschinen
DE10117409A1 (de) 2001-04-06 2002-10-17 Contitech Elastomer Besch Gmbh Drucktuch zur Verwendung auf Druckzylindern für insbesondere Offset-Druckmaschinen
US6530321B2 (en) * 2000-03-21 2003-03-11 Day International, Inc. Flexible image transfer blanket having non-extensible backing
US20050098051A1 (en) * 2003-11-10 2005-05-12 W. Toriran Flint Printing blanket construction and method of making
US20050241503A1 (en) * 2004-04-30 2005-11-03 Eduard Hoffmann Transfer blanket, in particular rubber blanket, for a printing press

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562470B1 (fr) * 1984-04-09 1986-10-17 Michelin & Cie Procede de collage de deux corps en caoutchouc par vulcanisation d'une couche de liaison; produits adaptes pour l'utilisation d'un tel procede; produits obtenus en application d'un tel procede
DE19547917A1 (de) * 1995-12-21 1997-07-03 Koenig & Bauer Albert Ag Gummituch für einen Gummituchzylinder
US5749298A (en) * 1997-06-10 1998-05-12 Reeves Brothers, Inc. Arrangement for securing a printing blanket to a cylinder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543584C1 (de) 1995-11-23 1997-07-24 Koenig & Bauer Albert Ag Gummituch für eine Druckmaschine
US6530321B2 (en) * 2000-03-21 2003-03-11 Day International, Inc. Flexible image transfer blanket having non-extensible backing
DE20007227U1 (de) 2000-04-20 2001-05-23 Contitech Elastomer Besch Gmbh Drucktuch zur Verwendung auf Druckzylindern für insbesondere Offset-Druckmaschinen
DE10117409A1 (de) 2001-04-06 2002-10-17 Contitech Elastomer Besch Gmbh Drucktuch zur Verwendung auf Druckzylindern für insbesondere Offset-Druckmaschinen
US20050098051A1 (en) * 2003-11-10 2005-05-12 W. Toriran Flint Printing blanket construction and method of making
US20050241503A1 (en) * 2004-04-30 2005-11-03 Eduard Hoffmann Transfer blanket, in particular rubber blanket, for a printing press

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Search report of German Patent Application 103 60 015.9, date unknown.

Also Published As

Publication number Publication date
US20050166778A1 (en) 2005-08-04
EP1543987A1 (de) 2005-06-22
DE502004007727D1 (de) 2008-09-11
DE10360015A1 (de) 2005-07-28
EP1543987B1 (de) 2008-07-30

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Effective date: 20151211